JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV UNDERGROUND METAL MINING TECHNOLOGY Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Define ore bin.
Answer
An ore bin is a large storage structure or bunker located underground or at the surface, designed to temporarily hold broken ore before it is transported to the next stage of processing or hoisting.
Define ore pass.
Answer
An ore pass is a vertical or steeply inclined underground opening or raise used to transfer broken ore by gravity from upper levels to lower levels or to a main haulage level for extraction.
What is the sequence of stoping?
Answer
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What is the sublevel stoping?
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What is deep mining?
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How are mining reserves calculated?
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What do you mean by optimum production level?
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What is a stope in mining terms?
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What is the unsupported underground mining method and give one example?
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Describe Rapid excavation.
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Part B
What are stoping methods in mining? Explain any two in detail.
Answer
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What are the advantages of modern mining from traditional mining?
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What do you mean by Level Interval? Explain the advantages and disadvantages of short level interval.
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Explain the following.
X cuts
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Raises
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Winzes.
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Explain in detail the designing of stope layout.
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Explain the importance and method of unit cost calculation in stoping.
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Explain stope and pillar mining with the help of neat sketches.
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Explain top slicing and sublevel caving with neat sketches.
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Explain Hydraulic mining and slurry mining with sketches.
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What is thermal fragmentation?
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Explain the large blast hole stoping.
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